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A Nanobar-Supported Lipid Bilayer System for the Study of Membrane Curvature Sensing Proteins in vitro
Published on: November 30, 2022
Supported lipid bilayers with controlled curvature via colloidal lithography
Maria Sundh1, Michal Manandhar, Sofia Svedhem
1Interdisciplinary Nanoscience Center (iNANO), Aarhus University, 8000 Aarhus, Denmark. sundh@inano.au.dk
IEEE Transactions on Nanobioscience
|September 20, 2011
Summary
Researchers developed a method to create curved supported lipid bilayers (SLBs) on nanostructured surfaces. This technique allows for the study of how membrane curvature influences molecular interactions, advancing lipid membrane research.
Area of Science:
- Biophysics
- Materials Science
- Surface Chemistry
Background:
- Supported lipid bilayers (SLBs) are crucial for studying molecular interactions at lipid membranes using surface-based techniques.
- Fabricating SLBs with controlled curvatures presents a significant challenge in membrane biophysics.
Purpose of the Study:
- To present a novel method for fabricating supported lipid bilayers (SLBs) with controlled nanometer-scale curvatures.
- To investigate the influence of surface curvature on SLB formation and properties.
Main Methods:
- Utilized lipid vesicle rupture onto nanostructured sensor substrates with templated silicon dioxide films.
- Employed heat-treated colloidal particle masks to control the radius of curvature (ROC) from 70 to 170 nm.
- Verified vesicle rupture and SLB formation using quartz crystal microbalance with dissipation monitoring (QCM-D) and fluorescence microscopy.
Main Results:
- Demonstrated the formation of confluent SLBs on nanostructured surfaces using POPC lipid vesicles.
- Observed hindered vesicle rupture on surfaces with decreasing ROCs.
- Successfully formed high-quality SLBs across all studied curvatures by incorporating the positively charged lipid POEPC.
Conclusions:
- Developed a versatile method for creating curved supported lipid bilayers over large areas.
- Established that incorporating charged lipids can overcome curvature-induced challenges in SLB formation.
- Opened new avenues for systematically investigating curvature-dependent molecular interactions at lipid membranes.
